Brief Answer:
Sonogram and a clinical exam needed.
Detailed Answer:
Hello,
Thanks for writing to us.
As the diagnosis of ovarian cysts was done so long ago, it remains to be seen if they are still persisting or have subsided. The cause of your current symptoms could be related to 
hormonal effects as well as uterine causes. 
I would ask you to see a specialist and get a proper evaluation. You would need a physical exam, sonogram-pelvic/trans-vaginal, complete hormonal profile, blood counts and 
urinalysis. 
Sometimes, ovulation can cause mild cramping on that side. 
Heavy periods are usually associated with uterine fibroids, hormonal disorders including 
thyroid anomalies and infections. A rupturing ovarian cyst, though can go unnoticed, causes excruciating pain and 
shock at times. It can be seen only in a sonogram study. Therefore, a complete evaluation would be needed to clarify the issue. 
Hope your query has been answered. Please feel free to contact for further clarifications. I will be happy to help.
regards,
Shanti.V.